Use of dcat:mediaType

Hi,

I am curious as to how dcat:mediaType should be used within a description.

There is a single example in the DCAT document that has a literal as the
value. Is there a list of all the valid values? WIll this be pointed to by
the document?

Have you thought about pointing to a URI instead of a literal? For example
using something like
http://purl.org/NET/mediatypes

Also, what is considered good practice when the dataset files have been
zipped? Should the content type be captured as something like
'Application/gzip' or should it still be the underlying data format, e.g.
'text/turtle'? How then should the fact that it is compressed be captured.
In an http header this would be captured with a separate field
Content-Encoding.

Thanks,

Alasdair